I have a custom field in product.template.

class ProductTemplate(models.Model):

    _inherit = "product.template"

   serial_no = fields.Char(string="Serial#")

i add the same field in move for added in move_lines

class ProductTemplate(models.Model):

    _inherit = "product.template"

   serial_no = fields.Char(string="Serial#")

notes

 I click "search more" on the moveline. I got the field to appear but there doesn't seem to be any data in it.The search window using product.product view
I am using an onchange function in stock.moves

function

@api.onchange('product_id')

def on_change_product(self):

        self.serial_no = self.product_id.serial_no

i get the serial no when i use create and edit  option. i use this the product.product window is opend.

how to get the values of product.template in onchage function?